Of course, cardiopulmonary training can improve bone mineral density, so it can help prevent or alleviate orthopedic problems, such as osteoporosis, but let's face it, not everyone is suitable for long-distance running, and the risks of running may outweigh the benefits. In addition, for an obese person who starts running, their extra weight will significantly increase the stress on joints and increase the risk of musculoskeletal problems.

2. The misleading of cardio-pulmonary exercise cases.

Observe a group of people who are suitable for aerobic exercise for the simple reason that you only see success, which may be misleading. When someone experiences pain or injury in aerobics class, they will naturally quit. These courses also include aerobic muscle training activities, such as push-ups or belly rolls, so you can't attribute this positive result to aerobic training.

3. Running on the treadmill leads to muscle imbalance.

Running on a treadmill is biomechanically different from normal running. Because running will pull your feet back, your back muscles will only do a little work. The result of muscle imbalance will promote posture problems and bring musculoskeletal problems, especially low back pain. According to the National Institutes of Health, the number one cause of disability or absence is back pain. By the age of 55, it is estimated that 80% of Americans will experience lower back pain. And people who have experienced low back pain should think twice before using the treadmill.

4. Running kills people.

People will fall on treadmills, and you will see a lot of tragic evidence on Youtube. (Skip)

Cardiopulmonary exercise is not as efficient as dieting to lose weight.

For overweight people, losing body fat and changing diet are more effective than exercise. In addition, when the body begins to adapt to cardiopulmonary exercise, the body will face training in a more efficient way, and the effect of burning fat will be reduced.

6. Outdoor aerobic exercise may be the load of toxins.

In short, the risk of exposure to toxic substances outdoors is higher.

7. Cardiopulmonary exercise inhibits muscle development.

One of the best ways to improve metabolism is to gain muscle. Unfortunately, cardiopulmonary exercise limits muscle development. From the experimental point of view, the athletes with the highest level of endurance have very few muscles.

8. Excessive cardio-pulmonary exercise makes you age faster.

Runners often joke. If you want to see yourself at 20, run a marathon and look in the mirror. Here is a terrible fact: aerobic training will increase the stress hormone cortisol.